Explanation

• LED (Light Emitting Diode) is a semiconductor device that emits light when electric current passes through it.
• It is widely used in lighting, displays, electronic indicators, and screens.

Additional information:

• Energy efficiency: Up to 90% more efficient than traditional bulbs
  First discovery: H. J. Round – 1907
  Early research: Oleg Losev – 1927
  Practical LED development: James R. Biard – 1961
  First commercial production: October 1962 (Nick Holonyak)

Last verified on 12-03-2026

Explanation

Explanation

Maximum Transmission Unit refers to the largest size of a data packet

That can be transmitted over a network medium.

If a packet is larger than the MTU, it must be fragmented into smaller packets.

Example: Ethernet typically has an MTU of 1500 bytes.

Last updated 15-feb-2026

Explanation

• SDLC stands for Software Development Life Cycle.
• SDLC is a structured process for developing software efficiently.
• It defines stages from planning to maintenance.
• Ensures software is high-quality, cost-effective, and meets requirements.
• Common phases: Requirement Analysis → Design → Implementation → Testing → Deployment → Maintenance.

Last verified on 07-02-2026

Explanation

• NIC stands for Network Interface Card.
  • It connects a computer to a network or internet.
  • It can be wired (Ethernet) or wireless (Wi-Fi).
  • Every NIC has a unique MAC address.
  • It enables data communication between devices.

Last verified on 07-02-2026

Explanation

CT Scan is a medical imaging technique.

It uses X-rays and computers to create cross-sectional images of the body.

Helps in diagnosing diseases, injuries, and internal conditions.

Additional Details / Facts

First CT scanner was invented in 1972 by Sir Godfrey Hounsfield.

CT images are also called slices, showing body structures in detail.

Explanation

An IP address is a unique address that identifies a device on the Internet or a local network.

IP stands for "Internet Protocol." 

It is the set of rules governing the format of data sent via the Internet or local network.

E-mail Address:

This identifies a user's mailbox for sending and receiving email, not the computer itself. 

Street Address:

This is a physical address and is not used to identify a computer on the internet. 

Login Password:

This is used to authenticate a user and gain access to an account or device, not to identify the device on the network. 

Explanation

• DVD stands for Digital Versatile Disc.
• It is a digital optical disc data storage format
• It was invented and developed in 1995 
• First released in Japan on November 1, 1996.
• Developed by: Sony; Panasonic; Philips; Toshiba

Last updated: 26 Oct 2026 

Explanation

• Full Form: Internet of Things
• Definition: A network of physical devices connected to the internet.
• Purpose: Collecting and exchanging data.
• Examples: Smartwatches, smart TVs, smart home appliances.
• Key Technologies: Sensors, software, and internet connectivity.
• Main Benefit: Automation and remote monitoring.

Last updated: 27 OCT 2026 

Explanation

Frequency Division Duplexing (FDD):

A telecommunications method allowing simultaneous two-way communication (uplink/downlink) by using separate frequency bands, creating constant channels but less flexible for traffic changes.